Explore Space Missions
![](/images/icons/mission_exploration.jpg)
For as long as there have been people on Earth, we have looked up at the sky and wondered ...
Read more
![](/images/icons/mission_human.jpg)
It was not long after the first space satellites were launched that we succeeded in getting ...
Read more
![](/images/icons/mission_unmanned.jpg)
Satellites and robot spacecraft are important to space exploration. They let us explore space ...
Read more
![](/images/icons/mission_links.jpg)
These are links to other great web sites about Space Missions. But beware: you don't want ...
Read more
![](/images/icons/mission_tours.jpg)
Take off on an Exploratour! Click on one of the many tours listed below to follow a guided ...
Read more
Did you know?
Did you know that there is some pretty
strange stuff in space?
Did you know that we look back in time when we look into the cosmos?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Sand boilxSand boil : A sand boil is sand and water that come out onto the ground surface during an earthquake as a result of liquefaction at shallow depth.
Click on the word to find out!
Research Highlights
The sun goes through cycles that last approximately 11 years. These solar cycle include phases with more magnetic activity, sunspots, and solar flares. They also include phases with less activity. The...
Read more![](/olpa/images/solar_cycle_small.jpg)